Packing composition



Patented Jan. 8, 1935 td'EheQDorin Corporation, corporation ofNewJersey a Y Messing. Application February 1,

This. invention relates to a' packing composi- 3 tion and more particularly to a packing composi-' tion capable of .being used'in' a loose] condition or in :a'molded state as 'a'lubricant packihgsbetween moving parts ofmechanical apparatus; 'as well as for sealing joints .or connecti'on's between'stationa'rypm'ts; 1 -T.ft .1:

1 Hior' to this invention; different packing compositions TWEIB provided for different uses. was dueto the fact. that the components of one" for purposes packing rendered it incapable of 'use I v other than that for lwhich 1 it -was specifically devised. :EE crTexample, .a'. low pressure steam- 'pack*- ing could not successfully be employed for pack 1 ing joints or parts of high pressure equipment.

Likewise, .:a. packing rde'velopediuf or use? in equipment and which might contact' :with ammonia could not, be usedTfor packing "parts of apparatus wherein it might contact with acids. :Ev'en-with packings for .-:acid equipment it was necessary to have a different; packing .for"thezdifierentblesses of acids.

Therefore, in the variety 'and' number of packings required and'employed in' the i werelrelatively large.

maintenance of: equipment As aconsequence, .the costofrthe packing service wasconsiderabla. 1ui I I have found that'by'iemploying 'unalloyedantimony' in powder 'form: 'I* can produce a packing:

composition which can-be used int-either :a, loose or molded; state and is not limitdxintits use but which iscapable of wide and extensive industrial application,

compositions oflimiteduse. v

"-It is thereforean object of.this invention 'to provide apacking composition whichacantbe used either ,in the loose 1or;molded statei and-isT-not restrictedto a limitedjapplication but ori the contrary-is capableiofzextensive 'useifor many va ried industrial-applications 5 including use asa lubricating packing. I i .A specific object of this invention is to.-provide a". packing composition suitable 1 for, many mony inpowder form: as .the metallic ingredient thereof, said packing loose or molded forms.

Other objects will appear from the following description and appended claims.

The above objects are achieved by the present invention which contemplates a packing composition containing as the metallic ingredient thereof, powdered metallic antimony in an unalloyed and consequently eliminate th'e. necessity for a large variety of specific 'x-packing varied 3 industrial applications including 1 use i as a lubri- I eating; packing which ;contains unalloye danti-.-

being capable of use in the pressures are not UnionICity, N. L, at

1932, Serial COl'lditiOlliDT st in the unalloyed state mony which has not beencombined with other metals to form alloys but which may contain as impurities thereof metals. In'th'e preferred'formof thelinvention, the antimony is powdered to' 200' mesha In tiddition' to the powdered antimony; "the composition preferably also comprises suitable fibers or fillersmne'ormore lubricants and abinder which promotes cohesion between'the constituents of the entire mass, a

As the fibrous material;iasbestos fibers; hemp, flax, etc. or mixtures thereof may be used. Amongst the examplesof lubricants which have givenuzs'atisfactory results may be mentioned graphite ..and .talc.

suitable, solvent .with .or without. modifying .in-

' gredients,.such.as..palm oil,.and with.orwithou 11 vulcanizing agents or accelerators, N

".It'is apparent that the proportion o th ri'ous ingredients constituting the' pac g may vary within wide limits; The iantimmi such as..5% or lessup to by Weight; or'eve more, depending on theultimate' use oith'e urges hereafter illustrated; f f'Aipacking ior use in condenser tubes 1 jected to very low pressures at temperatures exceeding denser tube through "the pa'cking is small and 3 measured in thousandths ofan'jinch. 'I'he' packing of suc chiefly and practically'as a gasket. For such se ice the packing may contain as little as 5% by weight orevn less of antimonyf I t P A "packing for use in valves operating at pres sures not exceeding p9 "*$9 at saturated steamtemperaturesrequires a rna because of terialhaving a moresubstantial body- 1 the wear occasioned by the opening 1 and." closing of. the valves.

of the packing;

A packing for use excessive and temperatures range from atmospheric to 200 F. requires somewhat heavier body than that setiorth in the para-' graph immediately preceding. For slow speed reciprocating units,'the metal content 'may approximate 25% to 50 by weight of the packing composition. For a higher speed centrifugal pump ate. By the expression antimony is meant metallic antia very minor portion of=other .The :binder may comprise. pitch, ..heavy.v mineraLoil. ..or preferably rubber compounds, suchv as crepelatex, .para gum rubfJ-i her or bal'ata, admixed with or dissolved .in -a=i content may vary from a relative smallfp'ercentage;

F. The movement of the' 1 1-". extremely For thistype'of' "servic'e the'anti monycont'ent: maybe from-20 to 3 0% byweight' light duty where the; asbestos fibers forming I While the mass is agitated, the remainderof the packing is tillates, oils, etc. and other compounds having solvent or other action against the other components of the packing which are less inert than the antimony.

The specific proportions of the otheringredients may be varied within wide limits as will be comeapparent to one skilled in the art.

As illustrative examples of packing compositions which have given satisfactory results, the following compositions are set forth:

. 1 Example I 12 pounds asbestos fiber pounds powdered metallic antimony 12 pounds graphite.

3 gallonsfrubber compound (consisting oi. 3 pounds para gum rubber, 2 ounces palm oil, 1 ounces rubber anti-oxidant, 3 ounces sulphur, 4 ounces zinc oxide, 1 ounce piperidine pentamethylene dithiocarbamate, 12 quarts naphtha) Example I! V i Pounds Asbestos spinning flb're 9. Powdered antimony; 75 Flake graphite l0 Rubber (naphtha solu ion containing 10% 15% rubber) 4 Palm oil -i 1% One mode of preparing the composition comprises introducing the asbestos fibers in a suitable pulping or. mixing machine and mixing it with asuitable quantity of, the binder until the binder substantially'coats the fibers. .The powdered an-' ytimony is then added, preferably gradually, and the mixing continued until the metallic powder is bonded to and thoroughly covers the surfaces 01" metal coated fibers.

binder is then added and finally the graphiteis 1 introduced. After. all the components have, been added, the stirring of-the mass iscontinued until it acquires the consistency of heavy dough or;

P ty- It is to be understood that the preparation oi;

the composition is not restricted to the exact procedure above outlined. For example, the sequence ,of steps andthe quantities of materials added may be changed.

The resultant composition, as is apparent from,

the preceding, is in the form of a plastic mass. It

may'be employed in this condition or, if desired,

it may be molded to form packings of predetermined shapes and sizes. One specific procedure for producing a molded composition is set forth in copending application Serial No. 426,072, filed February 5, 1930.

The composition by virtue of the metallic ingredient, i. e. antimony, is resistant to reaction with commercially used chemicals, oils, gases or other itself inert, for an extended period, to reaction with or decomposition from'chemicals or other materials with which it may come in contact in its ultimate application. It is also capable of beflliids. In other words, the composition is.

tion may be easily, economically and conveniently prepared- It does not require any extensive apparatus, processing or labor.

Since it is obvious that various modifications and changes may be made in the above-described process, I do not intend the exact details described except as defined in the appended claims.

This application isa'continuation-inepart of: my prior application, Serial No. 520,455, filed March 5, 1931.

. I claim:

1. A packing composition tor different. industrial uses including lubricatingpurposes and a loose or'molded state containcapable of use in ing 5% to1'75% by weight 01' powdered unalloyed metallic antimony as the metallicingredient; w

2. A packing trial uses including lubricating purposes and capable of use in a loose ormolded state containing 5% to 75% by weight 01 200 mesh unalloyed metallic antimony as. the metallic ingredient.

3..A packing compostion fordiiferent indus-"- trial uses including lubricating purposes and capable of use in a loose or molded statecompris ing at least 5% of powdered 4.:A packing compostion i'or diflerentindustrial 'uses "including lubricating. purposes and capable of use in a loose or molded state com- .prising 20% to 30% 01' powdered unalloy'ed antimony:- I i w y 5. A packing composition fordifferentfindustrial uses including lubricating -:purposes and molded state .comprisi-i powdered unalloyed antimony. 6. A packing composition for 'diilerent indus'-' capable of use in a loose or ing 30% to% of trial uses including lubricatingpurposes" and capable of use in a loose or molded prising 7. A packingcomposition for difl'erent industrial uses including lubricating purposes and.

to limit this invention to;

composition vfor diflerent indus unalloyed antimony.

state; loom of powdered unalloyed antimony. 

